68824896997 has 4 divisors (see below), whose sum is σ = 69029125516. Its totient is φ = 68620668480.

The previous prime is 68824896971. The next prime is 68824897049. The reversal of 68824896997 is 79969842886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79969842886 = 2 ⋅39984921443.

It can be written as a sum of positive squares in 2 ways, for example, as 8665561921 + 60159335076 = 93089^2 + 245274^2 .

It is a cyclic number.

It is not a de Polignac number, because 68824896997 - 2¹⁹ = 68824372709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68824891997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102113754 + ... + 102114427.

It is an arithmetic number, because the mean of its divisors is an integer number (17257281379).

Almost surely, 2^68824896997 is an apocalyptic number.

It is an amenable number.

68824896997 is a deficient number, since it is larger than the sum of its proper divisors (204228519).

68824896997 is a wasteful number, since it uses less digits than its factorization.

68824896997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204228518.

The product of its digits is 752467968, while the sum is 76.

The spelling of 68824896997 in words is "sixty-eight billion, eight hundred twenty-four million, eight hundred ninety-six thousand, nine hundred ninety-seven".